摘要
目的研究两种应力集中系数7050厚板铝合金材料在腐蚀环境下的腐蚀疲劳性能。方法开展7050厚板铝合金材料在3.5%NaCl盐水和油箱积水两种环境下的腐蚀疲劳实验,采用三参数式进行S-N曲线拟合分析不同应力集中系数、不同腐蚀环境对7050厚板铝合金材料疲劳性能的影响。结果腐蚀环境和应力集中系数都会对7050厚板铝合金材料的疲劳性能有影响,3.5%NaCl盐水和油箱积水两种腐蚀环境相较于应力集中系数对于降低材料疲劳性能的影响更大。结论减少7050厚板铝合金应力集中系数,加强7050厚板铝合金材料腐蚀防护对于提高材料抗疲劳性能有显著作用。
Objective To study the corrosion fatigue properties of 7050 thick plate aluminum alloy with different stress concentration coefficient under different corrosion conditions.Methods The corrosion fatigue experiment of 7050 thick plate aluminum alloy was carried out in 3.5% NaCl salt water and tank water.Influences of different stress concentration coefficient and different corrosion environment on fatigue performance of 7050 thick plate aluminum alloy was analyzed by S-N curve fitting with three parameters.Results Both corrosion environment and stress concentration coefficient had effects on fatigue performance of 7050 thick plate aluminum alloy.The effect of 3.5 % NaCl salt water and tank water on the fatigue performance of the material was greater than that of the stress concentration factor.Conclusion Reducing the stress concentration coefficient of 7050 thick plate aluminum alloy and strengthening the corrosion protection of 7050 thick plate aluminum alloy could improve the fatigue performance of the material significantly.
作者
张红飞
赵连红
王浩伟
ZHANG Hong-fei;ZHAO Lian-hong;WANG Hao-wei(Structure Corrosion Protection and Control of Aviation Science and Technology Key Laboratory,China Special Vehicle Research Institute,Jingmen 448035,China)
出处
《装备环境工程》
CAS
2019年第1期77-81,共5页
Equipment Environmental Engineering
关键词
7050厚板铝合金材料
应力集中系数
腐蚀环境
疲劳性能
7050 thick plate aluminum alloy material
stress concentration coefficient
corrosive environment
fatigue performance
